What is the difference detween ISR & function call
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Answer Posted / boss
If an interviewer asks this question. i would first say, it doesn't make a lot of sense in comparing these 2.
However, we can compare an ISR and a Function in terms of the do's and don'ts while writing them.
function can have anythings. there is no restriction. But ISR has some restrictions.
1. It should be as small as possible
2. Hence no large functin calls allowed (NO to printf())
3. No blocking function calls from an ISR. It should not
try to take a semaphore. but can release a
semaphore(counting/binary)
There may be few more. Pls google and collect all
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